“Naeel”
db58a433fb
- копирую модуль upload/ из drhider (слои 1-2) - blueprint: параметр sink (drhider-сессия по умолчанию, сверка — DB+парсинг) - upload_bp: contracts_upload_sink = _store_and_parse - routes: регистрирую create_upload_refs_blueprint(cfg, sink=...) - app.py: корень репо в sys.path (для import upload) - History: план переиспользования + ревью Соннета
51 lines
2.1 KiB
JavaScript
51 lines
2.1 KiB
JavaScript
// parseZip — разбор ZIP: центральный каталог → записи {name, data, dosMs, isDir}.
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// Поддерживаются методы 0 (store) и 8 (deflate). Без внешних библиотек.
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import { decodeZipName } from './decode_zip_name.js';
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import { inflateRaw } from './inflate_raw.js';
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import { dosToMs } from './dos_to_ms.js';
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export async function parseZip(buf) {
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const dv = new DataView(buf.buffer, buf.byteOffset, buf.byteLength);
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let eocd = -1;
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for (let i = buf.length - 22; i >= 0; i--) {
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if (dv.getUint32(i, true) === 0x06054b50) { eocd = i; break; }
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}
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if (eocd < 0) throw new Error('Не ZIP');
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const cdSize = dv.getUint32(eocd + 12, true);
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const cdOffset = dv.getUint32(eocd + 16, true);
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const entries = [];
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let pos = cdOffset;
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const cdEnd = cdOffset + cdSize;
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while (pos < cdEnd) {
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if (dv.getUint32(pos, true) !== 0x02014b50) break;
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const flags = dv.getUint16(pos + 8, true);
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const method = dv.getUint16(pos + 10, true);
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const modTime = dv.getUint16(pos + 12, true);
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const modDate = dv.getUint16(pos + 14, true);
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const compSize = dv.getUint32(pos + 20, true);
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const nameLen = dv.getUint16(pos + 28, true);
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const extraLen = dv.getUint16(pos + 30, true);
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const commentLen = dv.getUint16(pos + 32, true);
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const localOffset = dv.getUint32(pos + 42, true);
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const nameBytes = buf.slice(pos + 46, pos + 46 + nameLen);
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const name = decodeZipName(nameBytes, (flags & 0x800) !== 0);
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const lhNameLen = dv.getUint16(localOffset + 26, true);
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const lhExtraLen = dv.getUint16(localOffset + 28, true);
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const dataStart = localOffset + 30 + lhNameLen + lhExtraLen;
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const comp = buf.slice(dataStart, dataStart + compSize);
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let data;
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if (method === 0) data = comp;
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else if (method === 8) data = await inflateRaw(comp);
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else throw new Error('Метод сжатия ' + method + ' не поддерживается');
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entries.push({ name, data, dosMs: dosToMs(modDate, modTime), isDir: name.endsWith('/') });
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pos += 46 + nameLen + extraLen + commentLen;
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}
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return entries;
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}
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